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Contrast-enhanced ultrasonography in the early period after kidney transplantation predicts long-term allograft function.

Abstract：

INTRODUCTION:Real-time contrast-enhanced sonography (CES) can assess microvascular tissue perfusion using gas-filled microbubbles. The purpose of the study was to evaluate the feasibility of early CES in predicting long-term kidney allograft function in comparison to color Doppler ultrasonography (CDUS). METHODS:We prospectively studied 68 consecutive kidney transplant recipients using CES and conventional CDUS investigation 1 week after transplantation. Transplant tissue perfusion imaging was performed by low-power imaging during intravenous administration of the sonocontrast SonoVue. Renal tissue perfusion was assessed quantitatively using flash replenishment kinetics of microbubbles to estimate renal blood flow (RBF). The obtained sonography values were correlated with clinical data 1 week up to 1 year after transplantation. RESULTS:In contrast with conventional CDUS resistive indices, RBF estimated by CES 1 week posttransplantation significantly correlated with kidney function after 1 year (r = 0.67; P < .001). Determination of RBF by CES revealed a significant correlation with donor age but not recipient age, whereas conventional CDUS resistive index was significantly correlated to recipient age (r = 0.54; P < .001) but not donor age. Furthermore RBF was associated with vascular fibrosis and intimal thickening of the engraftment biopsies. CONCLUSION:This is the first prospective study demonstrating the prognostic value of CES early after kidney transplantation. In contrast with CDUS, CES reveals information about kidney allograft perfusion independent of recipient vascular compliance.

journal_name

Transplant Proc

journal_title

Transplantation proceedings

authors

Schwenger V,Hankel V,Seckinger J,Macher-Göppinger S,Morath C,Zeisbrich M,Zeier M,Kihm LP

doi

10.1016/j.transproceed.2014.04.013

subject

Has Abstract

pub_date

2014-12-01 00:00:00

pages

3352-7

issue

10

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(14)00928-2

journal_volume

46

pub_type

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